Rule 13a-14(d)/15d-14(d)Certification.

Re: Morgan Stanley Capital I Trust 2015-UBS8, Commercial Mortgage Pass-ThroughCertificates, Series 2015-UBS8 (the “Transaction”), issued pursuantto the Pooling and Servicing Agreement dated as of December 1, 2015 (the“Pooling and Servicing Agreement”), executed in connection with theTransaction (capitalized terms used but not defined herein have the meaningsset forth in the Pooling and Servicing Agreement).I, George Kok, certify that:

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| 1.     | I have reviewed this report  on Form 10-K and all reports on Form 10-D required to be filed in respect of  the period covered by this report on Form 10-K of Morgan Stanley Capital I  Trust 2015-UBS8 (the “Exchange Act periodic reports”);                                                                                                                                                                                                                                                                                                                        |
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| 2.     | Based on my knowledge, the  Exchange Act periodic reports, taken as a whole, do not contain any untrue  statement of a material fact or omit to state a material fact necessary to  make the statements made, in light of the circumstances under which such  statements were made, not misleading with respect to the period covered by  this report;                                                                                                                                                                                                                           |
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| 3.     | Based on my knowledge, all  of the distribution, servicing and other information required to be provided  under Form 10-D for the period covered by this report is included in the  Exchange Act periodic reports;                                                                                                                                                                                                                                                                                                                                                               |
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| 4.     | Based on my knowledge and  the servicer compliance statement(s) required in this report under Item 1123  of Regulation AB, and except as disclosed in the Exchange Act periodic  reports, the servicer(s) have fulfilled their obligations under the servicing  agreement(s) in all material respects; and                                                                                                                                                                                                                                                                       |
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| 5.     | All of the reports on  assessment of compliance with servicing criteria for asset-backed securities  and their related attestation reports on assessment of compliance with  servicing criteria for asset-backed securities required to be included in  this report in accordance with Item 1122 of Regulation AB and Exchange Act  Rules 13a-18 and 15d-18 have been included as an exhibit to this report,  except as otherwise disclosed in this report. Any material instances of  noncompliance described in such reports have been disclosed in this report on  Form 10-K. |
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In giving the certificationsabove, I have reasonably relied on information provided to me by the followingunaffiliated parties:

 

• Wells Fargo Bank,National Association, as Trustee• Wells Fargo Bank, National Association, as Certificate Administrator• Wells Fargo Bank, National Association, as Custodian• Midland Loan Services, a Division of PNC Bank, National Association, asMaster Servicer• Rialto Capital Advisors, LLC, as Special Servicer• Situs Holdings, LLC, as Operating Advisor• Wells Fargo Bank, National Association, as Master Servicer under theBACM 2016-UBS10 securitization, pursuant to which the following mortgage loanswere serviced: Grove City Premium Outlets (from 6/7/16 to 12/31/16)• CoreLogic Commercial Real Estate Services, Inc., as Servicing FunctionParticipant under the BACM 2016-UBS10 securitization, pursuant to which thefollowing mortgage loans were serviced: Grove City Premium Outlets (from 6/7/16to 12/31/16)• National Tax Search, LLC, as Servicing Function Participant under theBACM 2016-UBS10 securitization, pursuant to which the following mortgage loanswere serviced: Grove City Premium Outlets (from 6/7/16 to 12/31/16)• Wells Fargo Bank, National Association, as Master Servicer under theMSBAM 2016-C29 securitization, pursuant to which the following mortgage loanswere serviced: Gulfport Premium Outlets (from 5/5/16 to 12/31/16)• Midland Loan Services, a Division of PNC Bank, National Association, asSub-Servicer under the MSBAM 2016-C29 securitization, pursuant to which thefollowing mortgage loans were serviced: Gulfport Premium Outlets (from 5/5/16to 12/31/16)• CoreLogic Commercial Real Estate Services, Inc., as Servicing FunctionParticipant under the MSBAM 2016-C29 securitization, pursuant to which thefollowing mortgage loans were serviced: Gulfport Premium Outlets (from 5/5/16to 12/31/16)• National Tax Search, LLC, as Servicing Function Participant under theMSBAM 2016-C29 securitization, pursuant to which the following mortgage loanswere serviced: Gulfport Premium Outlets (from 5/5/16 to 12/31/16)• Midland Loan Services, a Division of PNC Bank, National Association, asMaster Servicer under the BACM 2015-UBS7 securitization, pursuant to which thefollowing mortgage loans were serviced: WPC Department Store Portfolio (from1/1/16 to 12/31/16)• Midland Loan Services, a Division of PNC Bank, National Association, asMaster Servicer under the CSAIL 2015-C3 securitization, pursuant to which thefollowing mortgage loans were serviced: Cape May Hotels (from 1/1/16 to12/31/16) and Charles River Plaza North (from 1/1/16 to 12/31/16)• Rialto Capital Advisors, LLC, as Special Servicer under the BACM2016-UBS10 securitization, pursuant to which the following mortgage loans wereserviced: Grove City Premium Outlets (from 6/7/16 to 12/31/16)• Rialto Capital Advisors, LLC, as Special Servicer under the MSBAM2016-C29 securitization, pursuant to which the following mortgage loans wereserviced: Gulfport Premium Outlets (from 5/5/16 to 12/31/16)• Rialto Capital Advisors, LLC, as Special Servicer under the CSAIL2015-C3 securitization, pursuant to which the following mortgage loans wereserviced: Cape May Hotels (from 1/1/16 to 12/31/16) and Charles River PlazaNorth (from 1/1/16 to 10/13/16)• Wells Fargo Bank, National Association, as Custodian under the BACM2016-UBS10 securitization, pursuant to which the following mortgage loans wereserviced: Grove City Premium Outlets (from 6/7/16 to 12/31/16)• Wells Fargo Bank, National Association, as Custodian under the MSBAM2016-C29 securitization, pursuant to which the following mortgage loans wereserviced: Gulfport Premium Outlets (from 5/5/16 to 12/31/16)• Wells Fargo Bank, National Association, as Custodian under the CSAIL2015-C3 securitization, pursuant to which the following mortgage loans wereserviced: Cape May Hotels (from 1/1/16 to 12/31/16) and Charles River Plaza North(from 1/1/16 to 12/31/16)

 

 

Date: March 31, 2017By: /s/ George KokName: George KokTitle: President